:root{--bk-bg:#0a0a0c;--bk-surface:#111116;--bk-surface-2:#18181f;--bk-surface-3:#202028;--bk-surface-4:#2a2a34;--bk-text:#f0ede8;--bk-text-2:#c8c4bc;--bk-text-3:#7a7772;--bk-text-4:#44403c;--bk-accent:#5b4bdb;--bk-accent-2:#7b6ef6;--bk-accent-glow:#5b4bdb66;--bk-accent-soft:#5b4bdb1a;--bk-border:#ffffff12;--bk-border-2:#ffffff0a;--bk-border-3:#ffffff1c;--bk-font-display:"Fraunces",Georgia,serif;--bk-font-body:"Geist",system-ui,sans-serif;--bk-max:1240px;--bk-ease:cubic-bezier(.4,0,.2,1);--bk-ease-spring:cubic-bezier(.34,1.56,.64,1)}.bk-page{background:var(--bk-bg);min-height:100vh;font-family:var(--bk-font-body);color:var(--bk-text);-webkit-font-smoothing:antialiased;position:relative;overflow-x:hidden}.bk-ambient{pointer-events:none;z-index:0;position:fixed;inset:0;overflow:hidden}.bk-ambient-orb{filter:blur(120px);opacity:.18;border-radius:50%;animation:20s ease-in-out infinite orbFloat;position:absolute}.bk-ambient-orb--1{background:radial-gradient(circle,#5b4bdb,#0000 70%);width:700px;height:700px;animation-duration:25s;top:-200px;left:-200px}.bk-ambient-orb--2{opacity:.12;background:radial-gradient(circle,#7b6ef6,#0000 70%);width:500px;height:500px;animation-duration:18s;animation-delay:-8s;top:40%;right:-150px}.bk-ambient-orb--3{opacity:.1;background:radial-gradient(circle,#3b82f6,#0000 70%);width:400px;height:400px;animation-duration:22s;animation-delay:-14s;bottom:10%;left:30%}@keyframes orbFloat{0%,to{transform:translate(0)scale(1)}33%{transform:translate(40px,-30px)scale(1.05)}66%{transform:translate(-20px,20px)scale(.97)}}.bk-ambient-grid{background-image:linear-gradient(#ffffff05 1px,#0000 1px),linear-gradient(90deg,#ffffff05 1px,#0000 1px);background-size:60px 60px;position:absolute;inset:0;-webkit-mask-image:radial-gradient(80% 80% at 50% 20%,#000 30%,#0000 100%);mask-image:radial-gradient(80% 80% at 50% 20%,#000 30%,#0000 100%)}.bk-header{z-index:1;text-align:center;padding:100px 28px 72px;position:relative}.bk-header-inner{max-width:720px;margin:0 auto}.bk-header-eyebrow{letter-spacing:.14em;text-transform:uppercase;color:var(--bk-accent-2);background:var(--bk-accent-soft);border:1px solid #7b6ef633;border-radius:100px;align-items:center;gap:8px;margin-bottom:28px;padding:7px 16px;font-size:11px;font-weight:600;display:inline-flex}.bk-eyebrow-dot{background:var(--bk-accent-2);border-radius:50%;width:6px;height:6px;animation:2.5s ease-in-out infinite eyebrowPulse}@keyframes eyebrowPulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(.7)}}.bk-header-title{font-family:var(--bk-font-display);letter-spacing:-.03em;color:var(--bk-text);margin:0 0 20px;font-size:clamp(2.6rem,6vw,4.4rem);font-weight:300;line-height:1.08}.bk-header-title em{color:var(--bk-accent-2);font-style:italic;font-weight:300}.bk-header-subtitle{color:var(--bk-text-2);max-width:560px;margin:0 auto 40px;font-size:1.05rem;font-weight:300;line-height:1.7}.bk-header-stats{background:var(--bk-surface-2);border:1px solid var(--bk-border);border-radius:16px;align-items:center;padding:4px;display:inline-flex;overflow:hidden}.bk-stat{flex-direction:column;align-items:center;gap:2px;padding:12px 28px;display:flex}.bk-stat-num{font-family:var(--bk-font-display);color:var(--bk-text);font-size:1.5rem;font-weight:400;line-height:1}.bk-stat-label{letter-spacing:.08em;text-transform:uppercase;color:var(--bk-text-3);font-size:10px;font-weight:500}.bk-stat-sep{background:var(--bk-border);width:1px;height:36px}.bk-body{z-index:1;max-width:var(--bk-max);margin:0 auto;padding:0 28px 100px;position:relative}.bk-controls{flex-direction:column;gap:16px;margin-bottom:36px;display:flex}.bk-controls-inner{align-items:center;gap:12px;display:flex}.bk-search-wrap{flex:1;position:relative}.bk-search-icon{color:var(--bk-text-3);pointer-events:none;position:absolute;top:50%;left:14px;transform:translateY(-50%)}.bk-search{background:var(--bk-surface-2);border:1px solid var(--bk-border);width:100%;height:44px;font-family:var(--bk-font-body);color:var(--bk-text);border-radius:12px;outline:none;padding:0 40px;font-size:14px;transition:border-color .2s,box-shadow .2s}.bk-search::placeholder{color:var(--bk-text-3)}.bk-search:focus{border-color:var(--bk-accent);box-shadow:0 0 0 3px var(--bk-accent-soft)}.bk-search::-webkit-search-cancel-button{display:none}.bk-search-clear{background:var(--bk-surface-3);cursor:pointer;width:20px;height:20px;color:var(--bk-text-3);border:none;border-radius:50%;justify-content:center;align-items:center;transition:color .15s,background .15s;display:flex;position:absolute;top:50%;right:12px;transform:translateY(-50%)}.bk-search-clear:hover{color:var(--bk-text);background:var(--bk-surface-4)}.bk-sort{background:var(--bk-surface-2);border:1px solid var(--bk-border);height:44px;font-family:var(--bk-font-body);color:var(--bk-text-2);cursor:pointer;appearance:none;white-space:nowrap;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none'%3E%3Cpath d='M6 9l6 6 6-6' stroke='%237a7772' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");background-position:right 12px center;background-repeat:no-repeat;border-radius:12px;outline:none;padding:0 36px 0 14px;font-size:13px;transition:border-color .2s}.bk-sort:focus{border-color:var(--bk-accent)}.bk-sort option{background:var(--bk-surface-3)}.bk-level-filters{flex-wrap:wrap;gap:8px;display:flex}.bk-level-pill{background:var(--bk-surface-2);border:1px solid var(--bk-border);font-family:var(--bk-font-body);color:var(--bk-text-3);cursor:pointer;transition:all .18s var(--bk-ease);border-radius:100px;align-items:center;gap:6px;padding:6px 14px;font-size:12.5px;font-weight:500;display:inline-flex}.bk-level-pill:hover{color:var(--bk-text-2);border-color:var(--bk-border-3)}.bk-level-pill--active{font-weight:600}.bk-pill-dot{border-radius:50%;flex-shrink:0;width:7px;height:7px}.bk-genre-filters{flex-wrap:wrap;gap:6px;display:flex}.bk-genre-pill{border:1px solid var(--bk-border-2);font-family:var(--bk-font-body);color:var(--bk-text-3);cursor:pointer;transition:all .18s var(--bk-ease);background:0 0;border-radius:8px;padding:5px 12px;font-size:12px;font-weight:400}.bk-genre-pill:hover{color:var(--bk-text-2);border-color:var(--bk-border);background:var(--bk-surface-2)}.bk-genre-pill--active{background:var(--bk-surface-3);border-color:var(--bk-border-3);color:var(--bk-text)}.bk-results-bar{justify-content:space-between;align-items:center;margin-bottom:32px;display:flex}.bk-results-count{color:var(--bk-text-3);font-size:13px}.bk-clear-filters{color:var(--bk-accent-2);cursor:pointer;font-size:12px;font-family:var(--bk-font-body);background:0 0;border:none;border-radius:6px;padding:4px 8px;transition:background .15s}.bk-clear-filters:hover{background:var(--bk-accent-soft)}.bk-section{margin-bottom:72px}.bk-section-header{margin-bottom:28px}.bk-section-title{font-family:var(--bk-font-display);letter-spacing:-.02em;color:var(--bk-text);align-items:center;gap:10px;margin:0 0 6px;font-size:1.7rem;font-weight:300;display:flex}.bk-section-title-accent{color:var(--bk-accent-2);font-size:1rem}.bk-section-sub{color:var(--bk-text-3);margin:0;font-size:13.5px;font-weight:300}.bk-hero-grid{grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:20px;display:grid}.bk-hero-card{border:1px solid var(--bk-border);transition:transform .3s var(--bk-ease),box-shadow .3s var(--bk-ease),border-color .3s;border-radius:20px;min-height:220px;text-decoration:none;display:block;position:relative;overflow:hidden}.bk-hero-card:hover{border-color:#7b6ef640;transform:translateY(-4px);box-shadow:0 24px 60px #00000080,0 0 0 1px #7b6ef633}.bk-hero-card-bg{opacity:.85;transition:opacity .3s;position:absolute;inset:0}.bk-hero-card:hover .bk-hero-card-bg{opacity:1}.bk-hero-card-noise{opacity:.4;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.08'/%3E%3C/svg%3E");position:absolute;inset:0}.bk-hero-card-inner{z-index:1;align-items:flex-start;gap:24px;padding:28px;display:flex;position:relative}.bk-hero-card-info{flex:1;min-width:0}.bk-hero-card-meta{flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:12px;display:flex}.bk-hero-genre{letter-spacing:.1em;text-transform:uppercase;color:#ffffff80;background:#ffffff14;border-radius:6px;padding:3px 8px;font-size:10px;font-weight:600}.bk-hero-levels{flex-wrap:wrap;gap:4px;display:flex}.bk-hero-title{font-family:var(--bk-font-display);letter-spacing:-.02em;color:#fff;margin:0 0 4px;font-size:1.45rem;font-weight:400;line-height:1.15}.bk-hero-author{color:#ffffff8c;margin:0 0 12px;font-size:13px;font-style:italic}.bk-hero-desc{color:#fff9;-webkit-line-clamp:2;-webkit-box-orient:vertical;margin:0 0 20px;font-size:13px;font-weight:300;line-height:1.6;display:-webkit-box;overflow:hidden}.bk-hero-footer{justify-content:space-between;align-items:center;display:flex}.bk-hero-stat{color:#fff6;align-items:center;gap:5px;font-size:12px;display:flex}.bk-hero-cta{color:#fff;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#ffffff26;border:1px solid #fff3;border-radius:100px;align-items:center;gap:6px;padding:7px 14px;font-size:13px;font-weight:600;transition:background .2s,gap .2s;display:inline-flex}.bk-hero-card:hover .bk-hero-cta{background:#ffffff40;gap:9px}.bk-cover{border-radius:10px;flex-shrink:0;position:relative;overflow:hidden;box-shadow:-4px 4px 12px #00000080,inset -2px 0 6px #0000004d}.bk-cover--sm{border-radius:7px;width:72px;height:100px}.bk-cover--md{width:120px;height:168px}.bk-cover--lg{width:130px;height:182px}.bk-cover-img{object-fit:cover;width:100%;height:100%;display:block}.bk-cover-spine{opacity:.7;width:6px;position:absolute;top:0;bottom:0;left:0}.bk-cover-texture{background:repeating-linear-gradient(0deg,#0000,#0000 2px,#ffffff04 2px 3px);position:absolute;inset:0}.bk-cover-shine{background:linear-gradient(135deg,#ffffff1f 0%,#0000 50%,#00000026 100%);position:absolute;inset:0}.bk-cover-content{text-align:center;z-index:1;flex-direction:column;justify-content:center;align-items:center;gap:6px;padding:10px 8px;display:flex;position:absolute;inset:0}.bk-cover-initials{font-family:var(--bk-font-display);opacity:.9;font-size:1.6rem;font-style:italic;font-weight:400;line-height:1}.bk-cover-title-small{font-family:var(--bk-font-display);color:#ffffffd9;-webkit-line-clamp:3;-webkit-box-orient:vertical;font-size:9px;font-weight:400;line-height:1.3;display:-webkit-box;overflow:hidden}.bk-cover-author-small{color:#ffffff73;font-size:8px;font-style:italic}.bk-badge{font-family:var(--bk-font-body);letter-spacing:.03em;border:1px solid;border-radius:6px;align-items:center;font-weight:600;display:inline-flex}.bk-badge--sm{padding:2px 7px;font-size:10px}.bk-badge--md{padding:3px 9px;font-size:11px}.bk-grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:24px;display:grid}.bk-card{background:var(--bk-surface);border:1px solid var(--bk-border-2);transition:transform .28s var(--bk-ease),box-shadow .28s var(--bk-ease),border-color .28s;cursor:pointer;animation:cardIn .4s var(--bk-ease)both;border-radius:16px;flex-direction:column;text-decoration:none;display:flex;overflow:hidden}.bk-card:hover,.bk-card--hovered{border-color:#7b6ef633;transform:translateY(-6px)scale(1.012);box-shadow:0 20px 50px #00000073,0 0 0 1px #7b6ef62e}.bk-card-cover-wrap{aspect-ratio:3/4.2;background:var(--bk-surface-2);justify-content:center;align-items:center;width:100%;display:flex;position:relative;overflow:hidden}.bk-card-cover-wrap .bk-cover{width:100%;height:100%;box-shadow:none;border-radius:0}.bk-card-hover-overlay{opacity:0;transition:opacity .22s var(--bk-ease);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#0000008c;justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.bk-card:hover .bk-card-hover-overlay{opacity:1}.bk-card-hover-btn{color:#fff;background:var(--bk-accent);letter-spacing:.02em;box-shadow:0 4px 20px var(--bk-accent-glow);border-radius:100px;padding:8px 18px;font-size:12.5px;font-weight:600}.bk-card-body{flex-direction:column;flex:1;gap:5px;padding:16px;display:flex}.bk-card-genre{letter-spacing:.1em;text-transform:uppercase;color:var(--bk-text-4);font-size:9.5px;font-weight:600}.bk-card-title{font-family:var(--bk-font-display);letter-spacing:-.015em;color:var(--bk-text);-webkit-line-clamp:2;-webkit-box-orient:vertical;margin:0;font-size:1rem;font-weight:400;line-height:1.25;transition:color .18s;display:-webkit-box;overflow:hidden}.bk-card:hover .bk-card-title{color:var(--bk-accent-2)}.bk-card-author{color:var(--bk-text-3);white-space:nowrap;text-overflow:ellipsis;margin:0;font-size:12px;font-style:italic;font-weight:300;overflow:hidden}.bk-card-levels{flex-wrap:wrap;gap:4px;margin-top:4px;display:flex}.bk-card-footer{border-top:1px solid var(--bk-border-2);justify-content:space-between;align-items:center;margin-top:auto;padding-top:10px;display:flex}.bk-card-downloads{color:var(--bk-text-4);align-items:center;gap:4px;font-size:11px;display:flex}.bk-card-date{color:var(--bk-text-4);font-size:11px}.bk-empty{text-align:center;flex-direction:column;align-items:center;gap:12px;padding:80px 28px;display:flex}.bk-empty-icon{filter:grayscale(.4);margin-bottom:8px;font-size:3.5rem}.bk-empty-title{font-family:var(--bk-font-display);color:var(--bk-text);margin:0;font-size:1.5rem;font-weight:300}.bk-empty-sub{color:var(--bk-text-3);margin:0;font-size:14px}.bk-empty-btn{background:var(--bk-surface-2);border:1px solid var(--bk-border);color:var(--bk-text-2);font-family:var(--bk-font-body);cursor:pointer;transition:all .18s var(--bk-ease);border-radius:100px;margin-top:8px;padding:10px 22px;font-size:13px}.bk-empty-btn:hover{background:var(--bk-surface-3);color:var(--bk-text);border-color:var(--bk-border-3)}.bk-guide{border-top:1px solid var(--bk-border-2);margin-top:80px;padding-top:72px}.bk-guide-inner{max-width:900px;margin:0 auto}.bk-guide-header{text-align:center;margin-bottom:44px}.bk-guide-title{font-family:var(--bk-font-display);letter-spacing:-.025em;color:var(--bk-text);margin:0 0 10px;font-size:clamp(1.5rem,3vw,2.2rem);font-weight:300}.bk-guide-sub{color:var(--bk-text-3);margin:0;font-size:14px;font-weight:300}.bk-guide-grid{grid-template-columns:repeat(5,1fr);gap:12px;display:grid}.bk-guide-card{background:var(--bk-surface);border:1px solid var(--bk-border-2);text-align:center;transition:transform .22s var(--bk-ease),border-color .22s,box-shadow .22s;border-radius:16px;flex-direction:column;align-items:center;gap:10px;padding:22px 16px;display:flex;position:relative;overflow:hidden}.bk-guide-card:before{content:"";background:var(--guide-color,var(--bk-accent));opacity:0;height:2px;transition:opacity .22s;position:absolute;top:0;left:0;right:0}.bk-guide-card:hover{border-color:#ffffff1a;transform:translateY(-3px);box-shadow:0 12px 36px #0000004d}.bk-guide-card:hover:before{opacity:1}.bk-guide-level{font-family:var(--bk-font-display);border:1px solid;border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;width:48px;height:48px;font-size:1.4rem;font-style:italic;font-weight:400;display:flex}.bk-guide-name{letter-spacing:.06em;text-transform:uppercase;color:var(--bk-text-3);font-size:11px;font-weight:600}.bk-guide-desc{color:var(--bk-text-3);margin:0;font-size:12.5px;font-weight:300;line-height:1.6}@keyframes cardIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.bk-card:first-child{animation-delay:40ms}.bk-card:nth-child(2){animation-delay:80ms}.bk-card:nth-child(3){animation-delay:.12s}.bk-card:nth-child(4){animation-delay:.16s}.bk-card:nth-child(5){animation-delay:.2s}.bk-card:nth-child(6){animation-delay:.24s}.bk-card:nth-child(7){animation-delay:.28s}.bk-card:nth-child(8){animation-delay:.32s}.bk-hero-card{animation:cardIn .5s var(--bk-ease)both}.bk-hero-card:first-child{animation-delay:50ms}.bk-hero-card:nth-child(2){animation-delay:.12s}.bk-hero-card:nth-child(3){animation-delay:.19s}@media (max-width:1024px){.bk-guide-grid{grid-template-columns:repeat(3,1fr)}}@media (max-width:768px){.bk-header{padding:72px 20px 48px}.bk-body{padding:0 20px 72px}.bk-controls-inner{flex-direction:column;align-items:stretch}.bk-sort{width:100%}.bk-hero-grid{grid-template-columns:1fr}.bk-hero-card-inner{flex-direction:column;padding:20px}.bk-cover--lg{width:100px;height:140px}.bk-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:16px}.bk-guide-grid{grid-template-columns:repeat(2,1fr)}.bk-stat{padding:10px 18px}}@media (max-width:480px){.bk-grid{grid-template-columns:repeat(2,1fr);gap:12px}.bk-guide-grid{grid-template-columns:1fr 1fr}.bk-card-body{padding:12px}}.bk-card:focus-visible,.bk-hero-card:focus-visible,.bk-level-pill:focus-visible,.bk-genre-pill:focus-visible,.bk-empty-btn:focus-visible{outline:2px solid var(--bk-accent-2);outline-offset:3px}@keyframes bk-shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.bk-skeleton{background:linear-gradient(90deg,#18181f 25%,#242429 50%,#18181f 75%) 0 0/200% 100%;border-radius:8px;animation:1.5s infinite bk-shimmer}.bk-skeleton-card{pointer-events:none}.bk-skeleton--hero{border-radius:20px;width:100%;min-height:220px}.bk-skeleton--cover{aspect-ratio:3/4.2;border-radius:0;width:100%}.bk-skeleton--line{width:100%;height:13px;margin-bottom:8px}.bk-skeleton--short{width:55%}.bk-skeleton--mid{width:75%}.bk-skeleton--title{width:200px;height:20px;margin-bottom:16px}.bk-error{color:#f87171;background:#ef444414;border:1px solid #ef444433;border-radius:14px;align-items:flex-start;gap:14px;margin-bottom:32px;padding:18px 20px;display:flex}.bk-error strong{color:#fca5a5;margin-bottom:3px;font-size:14px;display:block}.bk-error p{color:#f87171b3;margin:0;font-size:13px;font-weight:300}.bk-error svg{flex-shrink:0;margin-top:2px}.bk-error-retry{color:#f87171;font-family:var(--bk-font-body);cursor:pointer;white-space:nowrap;background:#ef44441f;border:1px solid #ef444440;border-radius:8px;flex-shrink:0;margin-left:auto;padding:7px 14px;font-size:12.5px;font-weight:500;transition:background .15s}.bk-error-retry:hover{background:#ef444438}